Dimensions:
Small ⇔ 57,5cm ⇕ 69,5cm
Medium ⇔ 60cm ⇕ 72cm
Large ⇔ 62,5cm ⇕ 74,5cm
X-Large ⇔ 65cm ⇕ 77cm
XX-Large ⇔ 67,5cm ⇕ 79,5cm